Abstract
HEAT insulation of pipes, boilers and generating sets, which used to be indicated by the general term ‘lagging’, has now become an art in itself and, to obtain the best results, the material must be graded and applied in a totally different manner for high-, medium- and low-temperature pipe lines and surfaces. In a paper presented at a semi-annual meeting in Milwaukee to the American Society of Mechanical Engineers by Messrs. E. T. Cope and W. F. Kinney, engineers to the Detroit Edison Co., the authors point out that in water-cooled boiler furnaces used in steam generating plants, it is common experience to find that cracks develop in the insulation on water-cooled furnace walls as the result of: (a) expansion and contraction of the setting, (b) shrinkage of the material, (c) settling of the material or (d) loosening of the material due to faulty attachment. Because of the likelihood of air infiltration as a result of this situation and to provide a pleasing external appearance, it is frequently considered necessary to encase waterwall furnaces in airtight steel shells, which in turn may require insulation.
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Heat Insulation in Electric Power Stations. Nature 146, 844 (1940). https://doi.org/10.1038/146844a0
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DOI: https://doi.org/10.1038/146844a0